Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Berrien County, Michigan
EPA puts Berrien County in Zone 3, its lowest radon zone, and 24.2% of its 1,192 reported radon tests (2008 to 2017, laboratory totals) were at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
24.2%
2.7 pts below MI
- Berrien
- 24.2%
- Michigan
- 26.9%
1,192 tests, 2008 to 2017
Median result
2.0pCi/L
Below action level
- Berrien
- 2.0 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
1,192
24th of 82 by tests
- Berrien
- 1,192
- Oakland
- 16,224
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Michigan
25 of 82
Middle half
- Berrien
- 24.2%
- Lenawee
- 56.7%
By share, of 82 with 30+ tests
Read a result for Berrien County
Starts at Berrien County's median, 2.0 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.0 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Berrien County's median reported result, 2008 to 2017.
The data
Berrien County, At a glance
Berrien County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Berrien County, 2008 to 2017, laboratory
Under 2 pCi/L: 49%2 to 4 pCi/L: 27%4 pCi/L and above: 24%
Of 1,192 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 577 | 48.4% |
| 2 to 4 pCi/L | 327 | 27.4% |
| 4 pCi/L and above | 288 | 24.2% |
What these figures count
These are the 1,192 tests reported to CDC for Berrien County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Berrien County, Compared
Berrien County radon figures, compared
Calculated by Radon411Berrien County's 1,192 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.0 pCi/L and a maximum of 293.3 pCi/L, and 24.2% reached 4 pCi/L. Michigan as a whole (83 Michigan counties, pooled) comes to 26.9%: 2.7 points higher than here.
Among its state's counties it ranks 25th of 82 Michigan counties with 30 or more tests for the same period. Statewide for the same period, Lenawee County reported the highest share (56.7%) and Muskegon County the lowest (3.2%).
Below the action level, 577 tests (48.4%) came in under 2 pCi/L, against 46.4% statewide, and 327 tests (27.4%) fell between 2 and 4, against 26.7% statewide. CDC's ten-year totals for Berrien County went from 991 tests (2005 to 2014) to 1,192 (2008 to 2017), the share going from 25.0% to 24.2%.
EPA's 1993 zone map puts Berrien County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.
Next door, the shares run from 18.0% in Van Buren County to 58.2% in LaPorte County, IN, with Van Buren County below Berrien County.
CDC also counts 123 tests taken after mitigation in Berrien County for the same period: tests in homes where a fix was already in.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Berrien County, State data
Michigan's own radon test data
MeasuredWhat Michigan's own agencies publish about radon tests in Berrien County, with their period. These are not CDC's figures and are never added to them.
MeasuredState figures, not CDC's
What Michigan EGLE reports for the ZIP codes in Berrien County
Michigan EGLE publishes its figures by ZIP code, not by county. These are the 21 ZIP codes that lie wholly or partly in Berrien County, each with the state's own figures for it. Period: About 10 years to 2026-05-15.
| ZIP code | What the state reports |
|---|---|
| 49022 | 10% greater than 4 pCi/L, median 1.7 pCi/L, 59 tests |
| 49038 | 12% greater than 4 pCi/L, median 1.6 pCi/L, 25 tests |
| 49047 | 21% greater than 4 pCi/L, median 1.6 pCi/L, 38 tests |
| 49085 | 11% greater than 4 pCi/L, median 1.4 pCi/L, 98 tests |
| 49098 | 0% greater than 4 pCi/L, median 0.3 pCi/L, 17 tests |
| 49101 | 0% greater than 4 pCi/L, median 0.0 pCi/L, 5 tests |
| 49102 | 4 tests, figures not shown |
| 49103 | 38% greater than 4 pCi/L, median 2.5 pCi/L, 50 tests |
| 49104 | 1 tests, figures not shown |
| 49106 | 0% greater than 4 pCi/L, median 0.9 pCi/L, 15 tests |
| 49107 | 40% greater than 4 pCi/L, median 3.3 pCi/L, 20 tests |
| 49111 | 0% greater than 4 pCi/L, median 1.9 pCi/L, 6 tests |
| 49113 | 30% greater than 4 pCi/L, median 3.0 pCi/L, 10 tests |
| 49115 | 2 tests, figures not shown |
| 49117 | 3 tests, figures not shown |
| 49120 | 32% greater than 4 pCi/L, median 2.6 pCi/L, 82 tests |
| 49125 | 0% greater than 4 pCi/L, median 1.0 pCi/L, 7 tests |
| 49126 | 0% greater than 4 pCi/L, median 0.0 pCi/L, 5 tests |
| 49127 | 7% greater than 4 pCi/L, median 1.5 pCi/L, 45 tests |
| 49128 | 0% greater than 4 pCi/L, median 1.3 pCi/L, 9 tests |
| 49129 | 2 tests, figures not shown |
- EGLE's figures cover first-time tests only, from organizations willing to provide data.
- EGLE does not publish figures for a ZIP code with fewer than 5 test results.
- EGLE says the map is not intended to decide whether a home should be tested: all homes should be tested.
- ZIP code boundaries are postal delivery areas, not legal or administrative boundaries.
- A ZIP code that crosses the county line is listed whole; its figures cover all of it.
Measured: Michigan EGLE data, About 10 years to 2026-05-15.
Berrien County, Geology
The ground under Berrien County
PredictedMost of the ground under Berrien County is one class on USGS's geologic map: 99.5% of its land is low radon potential, with 0.1% high and 0.3% moderate. All of it lies in the area the map calls Lake Michigan Lobe Deposits, to which USGS gives a radon index of 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Lake Michigan Lobe Deposits | Sandy to clayey glacial deposits and some glacial lake deposits. | Low | 8 | 99.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Berrien County beside the ground around it
On high-potential ground Berrien County is close to Michigan as a whole: 0.1% of its land against 9.6%. Of the 4 counties that border it, 3 have more high-potential ground, Cass County the most at 65.5%.
The map rates the ground, not the air in any home.
Local help
Berrien County, Local resources
Radon testing and mitigation in Berrien County
Listed radon businesses with an address in Berrien County:
- Michigan Indoor Radon ProgramMichigan Indoor Radon Program, run by Michigan Department of Environment, Great Lakes, and Energy, does not license radon professionals, and answers questions about testing and mitigation in Michigan.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- Professionals in Michigan69 professionals are listed in Michigan.
Listed radon professionals by town: Benton Harbor, Stevensville
What Michigan's program says
- Phone
- 800-723-6642
- Radon@Michigan.gov
- Licensing of radon professionals
Michigan does not license or regulate radon testing and mitigation contractors.
What it means
Berrien County, Questions
Questions about radon in Berrien County
Are radon levels high in Berrien County?
Over the 2008 to 2017 laboratory totals, 24.2% of the radon tests reported to CDC for Berrien County, Michigan were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.0 pCi/L. Of 82 Michigan counties with 30 or more tests for the same period, 24 reported a higher share; pooled, the state comes to 26.9%.
Which counties border Berrien County?
Berrien County borders 4 counties: Cass County, MI, St. Joseph County, IN, Van Buren County, MI and LaPorte County, IN.
Products
Berrien County, Products
Testing a home in Berrien County
In Berrien County, 24.2% of 1,192 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 26.9% pooled across Michigan. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Berrien County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
MonitorAranet
Radon Plus battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Approved
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Berrien County, Bordering counties
Counties bordering Berrien County
Calculated by Radon411- Radon levels in LaPorte County, INEPA zone 2
58.2%at or above 4 pCi/L
Median 5.0 pCi/L · 792 tests · 34.0 points above Berrien County
- Radon levels in Cass County, MIEPA zone 1
30.4%at or above 4 pCi/L
Median 2.6 pCi/L · 572 tests · 6.2 points above Berrien County
- Radon levels in St. Joseph County, INEPA zone 1
29.3%at or above 4 pCi/L
Median 2.7 pCi/L · 7,346 tests · 5.1 points above Berrien County
- Radon levels in Van Buren County, MIEPA zone 3
18.0%at or above 4 pCi/L
Median 1.9 pCi/L · 394 tests · 6.2 points below Berrien County
Berrien County, Cities and towns
Cities and towns in Berrien County
About 152,444 people live in Berrien County by the Census Bureau's estimate for July 1, 2025, 1,951 fewer than in 2020 (−1.3%). That works out to 268 people per square mile of land. Niles, the largest place on its list (11,665 residents in all), extends beyond Berrien County, so no share of the total is worked out for it. CDC's 1,192 reported tests for 2008 to 2017 work out to 7.8 per 1,000 residents (2025 estimate), close to Michigan's 11.3.
From Niles to Michiana, CDC publishes no figure by town: each reads Berrien County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Nilesextends beyond Berrien County | 11,665 | −2.5% | Counted whole |
| Benton Harbor | 8,803 | −3.1% | 5.8% |
| St. Joseph | 7,893 | −2.2% | 5.2% |
| Buchanan | 4,143 | −3.3% | 2.7% |
| Bridgman | 2,040 | −2.4% | 1.3% |
| Berrien Springs | 1,767 | −3.7% | 1.2% |
| Watervliet | 1,720 | +3.9% | 1.1% |
| New Buffalo | 1,685 | −1.2% | 1.1% |
| Coloma | 1,415 | −3.3% | 0.9% |
| Three Oaks | 1,390 | −2.0% | 0.9% |
| Stevensville | 1,154 | −0.5% | 0.8% |
| Baroda | 910 | +1.9% | 0.6% |
- Shoreham
- Eau Claire
- Galien
- Grand Beach
- Michiana
17 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. “(part)” marks a place that extends into another county. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025). A place that extends beyond Berrien County is counted whole, so it has no share.
Berrien County, Homes
Homes in Berrien County
Berrien County is a place of houses on their own lots: 77% of its 77,127 homes are detached single-family houses, against 72% across Michigan. Half of its homes were built before 1966, close to Michigan's 1972: 41% date from before 1960 and 13% from 2000 or later. 73% of occupied homes are lived in by their owner (Michigan: 73%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Berrien County | Michigan |
|---|---|---|
| Housing units | 77,127 | 4,599,683 |
| Detached houses | 77% | 72% |
| In buildings of 5 or more | 9% | 13% |
| Mobile homes | 4% | 5% |
| Built before 1960 | 41% | 36% |
| Built since 2000 | 13% | 15% |
| Middle year built | 1966 | 1972 |
| Owner-occupied | 73% | 73% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.